If each of these runners travels the indicated number of spaces in the same amount of time, at which numbered spot will all of the runners be next to one another? ~~Ik the answer I just want to see if u do~

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236